Alexander Graham BellЗавантажити презентацію
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Born: March 3, 1847 Parents: Alexander Melville Bell and Elisa Grace Symonds 2 brothers, Melville and Edward Alexander Graham Bell
After Graham was safe from catching the disease, his job led him to be a physiology professor at Boston University in the United States.
While Bell was in Massachusetts, he invented the harmonic telegraph, an instrument that makes it possible to send multiple telegraphs on one line. Boston University
The Simple Telephone There are three parts to the simple telephone. The Speaker, the Microphone and the Switch, also known as the Hook Switch.
The Telephone Today Today, phones have been able to get even smaller and even have no cords. In the bottom left, there is a palm pilot that can also be used at a phone. The telephone is a unique piece of equipment. No one can imagine our world without it.
A Sad day in History On August 2, 1922, Alexander Graham Bell died at his home in Baddek Nova Scotia.